Double side cooling and plane high temperature inverter for hybrid electric automobile

Abstract

The invention discloses a double side cooling and plane high temperature inverter for a hybrid electric automobile, which comprises an active switch chip and a diode chip. The active switch chip and the diode chip are arranged between an upper layer copper clad ceramic substrate and a lower layer copper clad ceramic substrate side by side; interfaces between the active switch chip and the diode chip and the upper layer copper clad ceramic substrate and the lower copper clad ceramic substrate are connected by sintering silver joints; a sealing material is filled in gaps among the active switch chip, the diode chip, the upper layer copper clad ceramic substrate and the lower copper clad ceramic substrate; and a metallic gasket is arranged below the relatively thin chip in the active switch chip and the diode chip to ensure that the heights of the active switch chip and the diode chip are equal. The inverter has good heat dissipation capability, can work under the condition of higher junction temperature, has high reliability of modules, can reduce the manufacturing and maintenance cost of the hybrid electric automobile, has the characteristics of lead-free, energy conservation, consumption reduction and environmental protection, reduces the consumption of energy such as gasoline and the like, and reduces the discharge of carbon dioxide.

Description

technical field [0001] The invention relates to a high-temperature inverter for automobiles. In particular, it relates to a double-sided cooling planar high-temperature inverter for hybrid electric vehicles that can work reliably at a junction temperature exceeding 175°C, eliminates the second set of cooling circulation system, and reduces the manufacturing cost and maintenance cost of hybrid electric vehicles. Background technique [0002] At present, the junction temperature of the hybrid electric vehicle inverter must not be higher than 150°C, usually 125°C is used as the junction temperature, and the current in the high-power inverter of the hybrid electric vehicle can be as high as hundreds of amperes, which will inevitably generate a large amount of Therefore, on the basis of the loop liquid cooling system in traditional cars (the temperature of the medium in the radiator is as high as 105°C), an additional set of cooling circulation system must be added, which will in...

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Problems solved by technology

However, the above-mentioned packaging technologies all use solder alloys to connect power chips, and the high-temperature performance of solder alloys limits the application of these power modules at high temperatures.

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